string relatedUpdatedAt() Get the name of the related model's "updated

static Builder on(string|null $connection =

Collection|

Builder getQuery()

HasOne class HasOne extends

string createdAt() Get the name of the "created at" column.

string getQualifiedParentKeyName() Get the fully qualified parent key name

string getQualifiedOtherKeyName() Get the fully qualified associated key

static mixed unguarded(callable $callback) Run the given callable

void addEagerConstraints(array $models) Set the constraints for an eager